* The two forces acting on an object at rest on Earth's surface are:

* Gravity: This pulls the object downwards towards the Earth's center. It's the force that gives the object its weight.

* Normal Force: This is an upward force exerted by the surface the object is resting on. It acts perpendicular to the surface and counteracts the force of gravity.

* Why the object doesn't move:

* Equilibrium: The object remains at rest because the forces acting on it are balanced. The force of gravity pulling the object down is precisely equal in magnitude and opposite in direction to the normal force pushing it up. This means the net force on the object is zero.

In simpler terms: Imagine a book sitting on a table. Gravity is trying to pull the book down, but the table pushes back up with an equal force. These forces cancel each other out, resulting in a motionless book.